Add a new class for Absolute Bias involving the function
diff --git a/ocw/metrics.py b/ocw/metrics.py
index b266012..199ab16 100644
--- a/ocw/metrics.py
+++ b/ocw/metrics.py
@@ -89,6 +89,28 @@
:rtype: :class:`numpy.ndarray`
'''
return calc_bias(target_dataset.values, ref_dataset.values)
+
+
+class AbsoluteBias(BinaryMetric):
+ '''Calculate the absolute bias between a reference and target dataset.'''
+
+ def run(self, ref_dataset, target_dataset):
+ '''Calculate the absolute bias between a reference and target dataset.
+
+ .. note::
+ Overrides BinaryMetric.run()
+
+ :param ref_dataset: The reference dataset to use in this metric run.
+ :type ref_dataset: :class:`dataset.Dataset`
+
+ :param target_dataset: The target dataset to evaluate against the
+ reference dataset in this metric run.
+ :type target_dataset: :class:`dataset.Dataset`
+
+ :returns: The absolute difference between the reference and target datasets.
+ :rtype: :class:`numpy.ndarray`
+ '''
+ return calc_absbias(target_dataset.values, ref_dataset.values)
class SpatialPatternTaylorDiagram(BinaryMetric):
